XML 34 R2.htm IDEA: XBRL DOCUMENT
v3.23.1

Pay vs Performance Disclosure | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) $ / shares | Dec. 31, 2021 USD ($) $ / shares | Dec. 31, 2020 USD ($) $ / shares
Pay vs Performance Disclosure [Table] |  |  |
Pay vs Performance [Table Text Block] |
PAY VERSUS PERFORMANCE
In accordance with rules adopted by the SEC pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010, we provide the following disclosure regarding executive CAP and certain MAA performance for the fiscal years listed below. You should refer to the Compensation Disclosure and Analysis section of this Proxy Statement for a complete description of how executive compensation relates to our performance and how the Compensation Committee makes its decisions.
|  |  |  |  | Value of Initial Fixed $100 Investment Based On: |  |
Year (a) | Summary Compensation Table Total for PEO (b) | Compensation Actually Paid to PEO (c) | Average Summary Compensation Table Total for Non-PEO NEOs (d) | Average Compensation Actually Paid to Non-PEO NEOs (e) | Total Shareholder Return (f) | Peer Group Total Shareholder Return (g) | Net Income (in thousands) (h) | Company Selected Measure Core FFO per Share (i)
2020 | $4,725,312 | $ 4,657,228 | $ 1,959,200 | $ 1,950,573 | $ 99.32 | $ 88.07 | $ 264,015 | $ 6.43
2021 | $7,667,655 | $ 22,312,216 | $ 2,855,123 | $ 8,092,843 | $ 184.54 | $ 142.47 | $ 550,702 | $ 7.01
2022 | $8,369,017 | $ 2,852,716 | $ 3,144,347 | $ 1,269,983 | $ 129.63 | $ 96.76 | $ 654,776 | $ 8.50
| Column (b): | Represents the Total amount in the Summary Compensation Table for Mr. Bolton, our CEO, for all years shown.
| Column (c): | CAP to Mr. Bolton, our CEO, was calculated as outlined below.
PEO | 2020 | 2021 | 2022
SCT Total Compensation | $ 4,725,312 | $ 7,667,655 | $ 8,369,017
Less: Stock and Option Award Values Reported in SCT | (2,852,176) | (3,742,806) | (4,123,473)
Plus: Fair Value for Stock and Option Awards Granted | 3,737,339 | 9,658,031 | 3,478,219
Change in Fair Value of Outstanding Unvested Stock and Option Awards from Prior Years | 277,089 | 7,960,118 | (4,189,587)
Change in Fair Value of Stock and Option Awards from Prior Years that Vested | (1,230,336) | 769,218 | (681,460)
Less: Fair Value of Stock and Option Awards Forfeited | - | - | -
Less: Aggregate Change in Actuarial Present Value of Accumulated Benefit Under Pension Plans | - | - | -
Plus: Aggregate Service Cost and Prior Service Cost for Pension Plans | - | - | -
CAP | $ 4,657,228 | $ 22,312,216 | $ 2,852,716
| Column (d): | Represents the average Total amount in the Summary Compensation Table for the Non-PEO NEOs for each respective year. In 2020, our NEOs, other than the CEO, were Messrs. Campbell, DelPriore and Grimes, and Melanie Carpenter. In 2021 and 2022, our NEOs, other than the CEO, were Messrs. Campbell, DelPriore, Grimes and Hill.
| Column (e): | Average CAP to each year’s Non-PEO NEOs was calculated as outlined below.
Average of NEOs | 2020 | 2021 | 2022
SCT Total Compensation | $ 1,959,200 | $ 2,855,123 | $ 3,144,347
Less: Stock and Option Award Values Reported in SCT | (1,059,644) | (1,258,533) | (1,253,096)
Plus: Fair Value for Stock and Option Awards Granted | 1,389,290 | 3,247,309 | 1,056,848
Change in Fair Value of Outstanding Unvested Stock and Option Awards from Prior Years | 107,852 | 2,968,733 | (1,418,158)
Change in Fair Value of Stock and Option Awards from Prior Years that Vested | (446,125) | 280,211 | (259,958)
Less: Fair Value of Stock and Option Awards Forfeited | - | - | -
Less: Aggregate Change in Actuarial Present Value of Accumulated Benefit Under Pension Plans | - | - | -
Plus: Aggregate Service Cost and Prior Service Cost for Pension Plans | - | - | -
CAP | $ 1,950,573 | $ 8,092,843 | $ 1,269,983
| Column (f): | Represents the cumulative value of $100 invested in MAA on December 31, 2019 through the last day of each respective year.
| Column (g): | Represents the cumulative value of $100 invested in the Dow Jones U.S. Real Estate Apartment Index, (the comparative index used in our incentive plans for performance share grants tied to multi-year relative TSR), on December 31, 2019 through the last day of each respective year.
| Column (h): | Represents the Net Income of MAA for each respective year, as expressed in thousands.
| Column (i): | Besides the relative 3-Year TSR metric in our incentive plans for NEOs, the largest performance compensation metric is Core FFO per share, a key metric for assessing our overall financial performance and the primary award financial metric within the AIP plan for our NEOs. For a reconciliation of Core FFO per Share to our financial statements see pages 94-95.
Company Selected Measure Name | Core FFO per Share |  |
Named Executive Officers, Footnote [Text Block] |
| Column (d): | Represents the average Total amount in the Summary Compensation Table for the Non-PEO NEOs for each respective year. In 2020, our NEOs, other than the CEO, were Messrs. Campbell, DelPriore and Grimes, and Melanie Carpenter. In 2021 and 2022, our NEOs, other than the CEO, were Messrs. Campbell, DelPriore, Grimes and Hill.
Peer Group Issuers, Footnote [Text Block] |
| Column (g): | Represents the cumulative value of $100 invested in the Dow Jones U.S. Real Estate Apartment Index, (the comparative index used in our incentive plans for performance share grants tied to multi-year relative TSR), on December 31, 2019 through the last day of each respective year.
PEO Total Compensation Amount | $ 8,369,017 | $ 7,667,655 | $ 4,725,312
PEO Actually Paid Compensation Amount | $ 2,852,716 | 22,312,216 | 4,657,228
Adjustment To PEO Compensation, Footnote [Text Block] |
| Column (c): | CAP to Mr. Bolton, our CEO, was calculated as outlined below.
PEO | 2020 | 2021 | 2022
SCT Total Compensation | $ 4,725,312 | $ 7,667,655 | $ 8,369,017
Less: Stock and Option Award Values Reported in SCT | (2,852,176) | (3,742,806) | (4,123,473)
Plus: Fair Value for Stock and Option Awards Granted | 3,737,339 | 9,658,031 | 3,478,219
Change in Fair Value of Outstanding Unvested Stock and Option Awards from Prior Years | 277,089 | 7,960,118 | (4,189,587)
Change in Fair Value of Stock and Option Awards from Prior Years that Vested | (1,230,336) | 769,218 | (681,460)
Less: Fair Value of Stock and Option Awards Forfeited | - | - | -
Less: Aggregate Change in Actuarial Present Value of Accumulated Benefit Under Pension Plans | - | - | -
Plus: Aggregate Service Cost and Prior Service Cost for Pension Plans | - | - | -
CAP | $ 4,657,228 | $ 22,312,216 | $ 2,852,716
Non-PEO NEO Average Total Compensation Amount | $ 3,144,347 | 2,855,123 | 1,959,200
Non-PEO NEO Average Compensation Actually Paid Amount | $ 1,269,983 | 8,092,843 | 1,950,573
Adjustment to Non-PEO NEO Compensation Footnote [Text Block] |
| Column (e): | Average CAP to each year’s Non-PEO NEOs was calculated as outlined below.
Average of NEOs | 2020 | 2021 | 2022
SCT Total Compensation | $ 1,959,200 | $ 2,855,123 | $ 3,144,347
Less: Stock and Option Award Values Reported in SCT | (1,059,644) | (1,258,533) | (1,253,096)
Plus: Fair Value for Stock and Option Awards Granted | 1,389,290 | 3,247,309 | 1,056,848
Change in Fair Value of Outstanding Unvested Stock and Option Awards from Prior Years | 107,852 | 2,968,733 | (1,418,158)
Change in Fair Value of Stock and Option Awards from Prior Years that Vested | (446,125) | 280,211 | (259,958)
Less: Fair Value of Stock and Option Awards Forfeited | - | - | -
Less: Aggregate Change in Actuarial Present Value of Accumulated Benefit Under Pension Plans | - | - | -
Plus: Aggregate Service Cost and Prior Service Cost for Pension Plans | - | - | -
CAP | $ 1,950,573 | $ 8,092,843 | $ 1,269,983
Compensation Actually Paid vs. Total Shareholder Return [Text Block] | Below are graphs that reflect the relationship between CAP to our CEO and other NEOs against the market and financial metrics included in the Pay versus Performance table on the previous page.
The relationship between CAP to our PEO and Average CAP to our Non-PEO NEOs to the Value of an Initial Fixed $100 Investment Based on cumulative TSR and cumulative Peer Group TSR is presented in the following chart. |  |  | The relationship between CAP to our PEO and Average CAP to our Non-PEO NEOs to Core FFO per Share is presented in the following chart.
Compensation Actually Paid vs. Net Income [Text Block] | Below are graphs that reflect the relationship between CAP to our CEO and other NEOs against the market and financial metrics included in the Pay versus Performance table on the previous page. The relationship between CAP to our PEO and Average CAP to our Non-PEO NEOs to Net Income is presented in the following chart. |  |
Compensation Actually Paid vs. Company Selected Measure [Text Block] | Below are graphs that reflect the relationship between CAP to our CEO and other NEOs against the market and financial metrics included in the Pay versus Performance table on the previous page.
The relationship between CAP to our PEO and Average CAP to our Non-PEO NEOs to the Value of an Initial Fixed $100 Investment Based on cumulative TSR and cumulative Peer Group TSR is presented in the following chart. |  |  | The relationship between CAP to our PEO and Average CAP to our Non-PEO NEOs to Core FFO per Share is presented in the following chart.
Total Shareholder Return Vs Peer Group [Text Block] | Below are graphs that reflect the relationship between CAP to our CEO and other NEOs against the market and financial metrics included in the Pay versus Performance table on the previous page.
The relationship between CAP to our PEO and Average CAP to our Non-PEO NEOs to the Value of an Initial Fixed $100 Investment Based on cumulative TSR and cumulative Peer Group TSR is presented in the following chart. |  |  | The relationship between CAP to our PEO and Average CAP to our Non-PEO NEOs to Core FFO per Share is presented in the following chart.
Tabular List [Table Text Block] | The below list of financial measures represents the measures the Compensation Committee felt were the most important measures in linking executive CAP to our performance during 2022. Consequently, these measures were used in our compensation incentive plans to link awards to performance realized. 3-Year TSR of MAA versus 3-Year TSR of the Dow Jones US Real Estate Apartment Index Annual Core FFO per Share Annual SS NOI Growth Annual FAD |  |
Total Shareholder Return Amount | $ 129.63 | 184.54 | 99.32
Peer Group Total Shareholder Return Amount | 96.76 | 142.47 | 88.07
Net Income (Loss) | $ 654,776,000 | $ 550,702,000 | $ 264,015,000
Company Selected Measure Amount | $ / shares | 8.5 | 7.01 | 6.43
PEO Name | Mr. Bolton | Mr. Bolton | Mr. Bolton
Measure [Axis]: 1 |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Measure Name | 3-Year TSR of MAA versus 3-Year TSR of the Dow Jones US Real Estate Apartment Index |  |
Measure [Axis]: 2 |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Measure Name | Annual Core FFO per Share |  |
Non-GAAP Measure Description [Text Block] |
| Column (i): | Besides the relative 3-Year TSR metric in our incentive plans for NEOs, the largest performance compensation metric is Core FFO per share, a key metric for assessing our overall financial performance and the primary award financial metric within the AIP plan for our NEOs. For a reconciliation of Core FFO per Share to our financial statements see pages 94-95.
Measure [Axis]: 3 |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Measure Name | Annual SS NOI Growth |  |
Measure [Axis]: 4 |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Measure Name | Annual FAD |  |
PEO [Member] | Stock and Option Award Values Reported in SCT [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | $ (4,123,473) | $ (3,742,806) | $ (2,852,176)
PEO [Member] | Fair Value for Stock and Option Awards Granted [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 3,478,219 | 9,658,031 | 3,737,339
PEO [Member] | Change in Fair Value of Outstanding Unvested Stock and Option Awards from Prior Years [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (4,189,587) | 7,960,118 | 277,089
PEO [Member] | Change in Fair Value of Stock and Option Awards from Prior Years That Vested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (681,460) | 769,218 | (1,230,336)
PEO [Member] | Fair Value of Stock and Option Awards Forfeited [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 0 | 0 | 0
PEO [Member] | Aggregate Change in Actuarial Present Value of Accumulated Benefit Under Pension Plans [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 0 | 0 | 0
PEO [Member] | Aggregate Service Cost and Prior Service Cost for Pension Plans [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 0 | 0 | 0
Non-PEO NEO [Member] | Stock and Option Award Values Reported in SCT [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (1,253,096) | (1,258,533) | (1,059,644)
Non-PEO NEO [Member] | Fair Value for Stock and Option Awards Granted [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 1,056,848 | 3,247,309 | 1,389,290
Non-PEO NEO [Member] | Change in Fair Value of Outstanding Unvested Stock and Option Awards from Prior Years [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (1,418,158) | 2,968,733 | 107,852
Non-PEO NEO [Member] | Change in Fair Value of Stock and Option Awards from Prior Years That Vested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (259,958) | 280,211 | (446,125)
Non-PEO NEO [Member] | Fair Value of Stock and Option Awards Forfeited [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 0 | 0 | 0
Non-PEO NEO [Member] | Aggregate Change in Actuarial Present Value of Accumulated Benefit Under Pension Plans [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 0 | 0 | 0
Non-PEO NEO [Member] | Aggregate Service Cost and Prior Service Cost for Pension Plans [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | $ 0 | $ 0 | $ 0

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToNonPeoNeoCompFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToPeoCompFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_CoSelectedMeasureAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_CoSelectedMeasureName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph iii + Details
Name: | ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph ii + Details
Name: | ecd_CompActuallyPaidVsNetIncomeTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph i + Details
Name: | ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_MeasureName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_NamedExecutiveOfficersFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_NonGaapMeasureDescriptionTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_NonPeoNeoAvgCompActuallyPaidAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_NonPeoNeoAvgTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_PeerGroupIssuersFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_PeerGroupTotalShareholderRtnAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_PeoActuallyPaidCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_PeoName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_PeoTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 1 + Details
Name: | ecd_PvpTable
Namespace Prefix: | ecd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 1 + Details
Name: | ecd_PvpTableTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 6 + Details
Name: | ecd_TabularListTableTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_TotalShareholderRtnAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph iv + Details
Name: | ecd_TotalShareholderRtnVsPeerGroupTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22595-107794 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 65 -Paragraph 1 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=124431353&loc=SL124452729-227067 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(A)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22663-107794 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 17: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(ii)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22583-107794 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126958026&loc=SL5780133-109256 Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22658-107794 Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669619-108580 Reference 25: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8924-108599 Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 11 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794 Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 11 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794 Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760 Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669625-108580 Reference 30: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 31: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 32: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(B)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 33: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(A)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 34: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599 Reference 35: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 + Details
Name: | us-gaap_NetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ecd_MeasureAxis=1
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=2
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=3
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=4
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_ExecutiveCategoryAxis=ecd_PeoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=maa_StockAndOptionAwardValuesReportedInSCTMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=maa_FairValueForStockAndOptionAwardsGrantedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=maa_ChangeInFairValueOfOutstandingUnvestedStockAndOptionAwardsFromPriorYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=maa_ChangeInFairValueOfStockAndOptionAwardsFromPriorYearsThatVestedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=maa_FairValueOfStockAndOptionAwardsForfeitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=maa_AggregateChangeInActuarialPresentValueOfAccumulatedBenefitUnderPensionPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=maa_AggregateServiceCostAndPriorServiceCostForPensionPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_ExecutiveCategoryAxis=ecd_NonPeoNeoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |